Concrete pile.



'11. E. LYUN.

CONCRETE PILE. APPLICATION lHmm JAN.14, 191s,

ATTORNEY.

teer E, met @5F Meistertite- CONCEETJE PUE.

maar

Speeieation of Letters lPatent.

@einem met weer ltltltitem1 N9' 'time `form of pile having an enlarged subter-y ranean base o r foundation which may be formed either before or after the pilehas been set or driven into the position it is intended to occupy. v

Further said invention has for its object to provide means for forming an enlarged `sub:terranean cavity by means of a suitable explosive agent which is so disposed as to avoid the cushioning action ot the air, and thus render the explosive agent more eiective in enlarging the area of the cavity.

Further said invention has for its object to provide a concrete pile possessing the requisite degree of hardness and Strength for the object in view, and which'is provided at its lower end with a point of relatively weaker concrete or other suitable material having a cavity to receive the explosive charge.

To the attainment of the aforesaid objects and ends my' invention consists in the novel details of construction and in the combination, connection and arrangement of parts hereinafter more fully described, and then pointed out in the claims.

ln the accompanying drawings forming part of this specification wherein like numera'ls of reference indicate like parts- Figure 1 is a central vertical section showing a previously formed concrete pile having a point of relatively weaker concrete formed at the lower end thereof provided with a cavity to receive an explosive charge, and the body of the pile provided with a central longitudinal opening communicating with the cavity in said point and adapted to receive a fuse; Fig. 2, is a similar view showing the explosive agent discharged, the point oi said pile shattered or destroyed, and an enlarged cavity formed at the base of the pile; Fig. 3, is a similar view showing a concrete base or foundation formed at the' lower end of the body of the pile, and the opening in said pile lled with vconcrete in prder to portion of said pile,

form a homogeneous structure, and Fig. 4 isa detail side elevation showing the lower portion of a pile.

ln carrying out my said invention l employ a prevlousl4 formed concrete ile 20 havmgja centra therein extending entirely through the body end of said pile a point 22 of relatively Patented dan.. 5l, im@

longitudinal openmg 21 and form atthe lower weaker concrete than that of" which the body portion of said pile is composed; llA

also provide the point 22 with a, central re' cess or chamber 23 which registers with the opening 2l in the body portion of the pile, and within said recessor chamber l place an explosive agent 24, 'such as dynamite or other suitable agent.

By preference the 'i lower end of the body portion of the pile is made straight in order -that the lpile. shall rest properly upon its base-or foundation, and the point 22 'is preferably made of tapering form as illustrated to facilitate the driving of the pile. After the pile has been driven to the desired extent, the explosive agent 24 is discharged, whereby the point 22 will be shattered and caused to cleave from the lower end of the pile 20. By the actipn of the explosive agent an enlarged cavity 25 will be formed at the base of the pile'20 as shown at Fig. 2. Hereupon the cavity 25 may be filled with concrete 26 through the central-opening 21 in the pile,l to form a base 27, and finally said opening 21 filled withconcrete thusv forming a solid homogeneous pile and base therefor.

It will of course be obvious that the body of the pile'may be of plain concrete or other suitable plastic material or of such material reinforced by suitable means, as -desired. Further it is to be noted that by inclosing the explosive charge in a relatively weak concrete block or point, l avoid the' cushioning eiiect of the air, which occurs 4where the explosive is not so inclosed, and.

thus render the explosive medium more eective, and produce a larger cavity.

l-Ieretofore when a cavity was to be enlarged by explosives, the method has been to fire successive charges of explosive, beginning with small charges and gradually increasing the amount, thus consuming much explosive and time, for the hole must be allowed to cool after each explosion before placing vthe next charge under this method. The cushioning edect of the'air diminished the edect of the explosion on the earth, and only aA small enlargement took place at each shot unless very large charges were used. This would not only be expensive but would tend to loosen the ground compacted and the cavity formed. One

shot properly placed in this way will give the desired result, and the shattered con-V crete blocks will form suitable aggregates to combine with the concrete which is subsequently deposited. A

Having thus described my invention wha I claim as new, and desire to secure by Letters Patent is:

1. A pile comprising a body portion formed of concrete, and a point adapted to receive an explosive medium, formed integrally with said body portion of relatively weaker material than said body portion, substantially as specified.

2. A pile comprising a body portion formed of plastic material, and a point, provided With means to receive an explosive charge, formed integrally with said body portion of relatively weaker plastic material than said body portion, substantially as specified.

3. A pile comprising a body portion formed of concrete, a point formed inte' grally thereon of relatively weaker concrete, and means arranged in said point for receiving an explosive medium, substantially as specied.

4. A pile comprisin a body portion `formed of concrete having a central opening extending therethrough, and a point of relatively weaker concrete formed integrally with saidv body portion at one end with said body portion at one end thereof;

said conical point havin a recess therein communicating with and orming acontinuation of the passage in said body portion, substantially as specilied.

6. A pile comprising a body portion formed of plastic material, and a point, provided with means to receive an explosive charge, formed integrally with said body portion of relatively weaker plastic material than said body portion, and having a definite plane of cleavage between said body portion and said point, substantially as specified. i Signed at the city of Norfolk,` in the county of Norfolk, and State of Virginia, this 30th day of December, 1912.

LON E. LYON.

Witnesses: e

WM. P. JERVEY, WALTER LATENBERGER. 

